Executive brief
SPIP is a popular open-source content management system used to build and manage websites. This vulnerability affects SQLite-backed installations and allows authenticated editors to execute arbitrary operating system commands through a malformed request to the navigation menu configuration page, potentially leading to complete server compromise.
Technical details
A code injection vulnerability exists in SPIP's navigation menu endpoint (/ecrire/?exec=navigation) where improper handling of array-typed user input bypasses input sanitization and allows an attacker to break out of an internal quoted string context during PHP evaluation. The vulnerability requires authentication (minimum editor/redacteur privileges) and is triggered via a single crafted GET request. An authenticated attacker can achieve arbitrary OS command execution in the web server process context. The vulnerability affects only SQLite-backed installations; MySQL-backed deployments are not affected. The fix is available in SPIP 4.4.18 and later versions.
Affected products
- SPIP SPIP before 4.4.18
Timeline
- 2026-08-10: disclosed
- 2026-08-10: patched: SPIP 4.4.18 released